It is common for birds to have reddening of the eyes or surrounding structures alone with no other symptoms. This is especially true of cockatiels. Birds with inflammation of the eyes or surrounding structures, however, may have also have an ocular discharge. And, since the sinuses are intimately associated with the eye, many birds will also have symptoms of upper respiratory tract disease, such as sneezing or nasal discharge.

To learn more, read Red Eye.

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